Bob-sled.



UNITED STATES NELS HALVORSEN, OF EDGERTON, WISCONSIN.

BOB-SLED.

Specification of Letters Patent.

" Patented Dec. 19, 1911.

Application led December 2, 1910` Serial No. 585,322.

To all whom it may concern:

Be it known that I, NELs HALvoRsEN, a citizen of the United States,residing at Edgerton, in the county of Rock and State of Wisconsin, haveinvented new and useful Improvements in Bob-Sleds, of which thefollowing is a specification.

This invention relates to bob sleds, and its object is to provide animproved con struction of the hound for the front bob, and also providemeans for limiting the oscillations of the beam, and thereby preventingit from being split by tripping backward when under load.

In the accompanying drawing, Figure 1 is a perspective view of myimproved bob sled. Fig. 2 is a side elevation of a portion of the same,showing the knee in section. Fig. 3 is a transverse section of the jointat the knee, and Fig. 4 is a top plan view, partly broken away of theconnection between the balancing bar and the roller to which the pole isfastened.

The sled comprises two runners 1 having the upwardly curved front ends 2in which is journaled the roller 3 to which the heel of the pole 4 isfastened. This end of the pole rests upon the roller, and is securedthereto by a strap 5 of metal which passes over the pole land hasdownwardly bent ends 6 provided with flanges 7 bolted to the roller. Oneor more bolts 8 pass through the upper part of the strap and the pole.Braces 9 extend diagonally from the sides of the pole to the ends of theroller. A clevis 10 on top of the pole affords means for attaching thewhitlletree. A knee 11 is erected on each runner consisting of aninverted U-shaped metal stri having a rounded upper end 12 which ts intoarecess in the under side of the beam 13. A metal wear plate 14 protectsthe beam, and the parts are kept in engagement by a U-shaped clip 15which passes through the bight of the knee and up throughthe beam, beingsecured by the nuts 16. On the upper side of the beam is placed thehound, composed of four strai ht bars 17 with their meeting ends mortiseor otherwise jointed together and secured by bolts 18 to form a suarecornered frame. A bolt 19 at the mid le of the two side bars passesthrough t-he beam and fastens the hound thereto. The side bars arefurthermore provided with braces consisting of straps o metal 2O whichrun down under the beam and are secured thereto, preferably by the bolts19. The upper faces of the bars 17 are provided with metal facings orwear strips 21.

At the center of the beam is a block 22 carrying the metal bolster plate23, on which rests the bolster 24. A king bolt runs down through thebolster and bolster plate and beam, and permits the bolster to swivelthereon, as usual. The bolster plate extends in front of and behind theblock 22, and under the front extension is secured the block 25. Thebalancing bar 26 is fastened to the under side of the block 25 and runsforward under the front cross bar 17 of the hounds, to which it is alsosecured by the bolt 27. The forward end of the balancing bar is providedwith one or more tongues 28, preferably two in number, one on each side.These project forward into loops on the roller, preferably formed byspaces left for them between the sides of the pole and the side portions6 of the strap 5, which do not fit against the sides of the pole, butstand a little away from it, as shown in Fig. 4. There is play enoughbetween the tongues and the strap to permit the pole to pivot freely onthe journals` of the roller, but the balancing bar is limited in its upand down movements sufficiently to keep the beam always substantiallylevel. This prevents it from being tipped over backward by a heavy load,and thus prevents the king bolt from bending or splitting the beam orbolster. A source of frequent trouble is thus entirely done away with.

The square-cornered hound is cheap and simple in construction and by myconstruction it is quite as strong and serviceable as those heretoforemade of bent pieces.

While I have shown and described the balancing bar in connection with asquare hound, yet it is evident that the shape of the hound isimmaterial, and that the balancing bar can be used equally well with ahound that is circular, or of any desired shape.

Having thus described my invention, what I claim is 1. The combinationwith the pole and the beam of a bob sled, of a hound composed ofstraight side bars resting on said beam, cross bars jointed to the endsof said bars, braces running from the ends of said bars down under saidbeam, through bolts fastening said side bars, beam and braces togelher abolster plate secured to said beam, and :i balnneinfr bar connected withthe un der side of saic plate and the under side of the front cross bnr,and adapted to engage loosely with the heel of the pole.

2. The Combination with a bob' sled having a bolster plate, a hound anda roller, of a balancing bar secured to said bolster pluie :1nd houndand provided at its frontencl with one or more tongues; a pole fas tenedto said roller, and a strap passing over said pole bent downwardly oneach side thereof sind secured lo the roller forming loops at each sideof the pole in which said tongues can engage wlth a certain amount; ofvertical play.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

NELS HALVORSEN.

lVitnesses VIoLE'rrr. TnlcvowAn, ADA HALvonsEN.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, D. C.

